Stephen L Sherman1, Onur Kadioglu2, G Frans Currier3, J Peter Kierl4, Ji Li5. 1. Private practice, Baton Rouge, La. 2. Division of Orthodontics, Department of Developmental Sciences, College of Dentistry, University of Oklahoma Health Sciences Center, Oklahoma City, Okla. Electronic address: onur-kadioglu@ouhsc.edu. 3. Division of Orthodontics, Department of Developmental Sciences, College of Dentistry, University of Oklahoma Health Sciences Center, Oklahoma City, Okla. 4. Division of Orthodontics, Department of Developmental Sciences, College of Dentistry, University of Oklahoma Health Sciences Center, Oklahoma City, Okla; Private Practice, Edmond, Okla. 5. College of Public Health, University of Oklahoma Health Sciences Center, Oklahoma City, Okla.
Abstract
INTRODUCTION: This study aimed to investigate whether a digital light processing (DLP) printer could perform efficiently and with adequate accuracy for clinical applications when used with different settings and variations in the orientation of models on the build plate. METHODS: Digital impressions of the oral environment were collected from 15 patients. Subsequently, digital impressions were used to make 3-dimensional printed models using the DLP printing technique. Three variables of the printing technique were tested: placement on the build plate (middle vs corner), thickness in the z-axis (50 microns vs 100 microns), and hollow vs solid shell. After being printed with different printing techniques and orientations on the same printer, a total of 240 maxillary and mandibular arches were measured. These variables generated 8 printing combinations. Tooth and arch measurements on each model type were compared with each other. Intraobserver reliability of the repeated measurement error was assessed using intraclass correlation coefficient. RESULTS: All mean differences among the printing variations were statistically insignificant. The Bland-Altman plots verified a high degree of agreement among all model sets and printing variations. In addition, the measurements were highly reproducible; this was demonstrated by the high intraclass correlation coefficient for all measurements recorded. CONCLUSIONS: The DLP printer produced clinically acceptable models in all areas of the build plate, with hollow and solid model shells, and at its high-speed setting of 100 microns. The applications of the DLP printer tested should be a viable option for printing in a clinical environment at a high-speed setting while filling the build plate and printing with less resin. Published by Elsevier Inc.
INTRODUCTION: This study aimed to investigate whether a digital light processing (DLP) printer could perform efficiently and with adequate accuracy for clinical applications when used with different settings and variations in the orientation of models on the build plate. METHODS: Digital impressions of the oral environment were collected from 15 patients. Subsequently, digital impressions were used to make 3-dimensional printed models using the DLP printing technique. Three variables of the printing technique were tested: placement on the build plate (middle vs corner), thickness in the z-axis (50 microns vs 100 microns), and hollow vs solid shell. After being printed with different printing techniques and orientations on the same printer, a total of 240 maxillary and mandibular arches were measured. These variables generated 8 printing combinations. Tooth and arch measurements on each model type were compared with each other. Intraobserver reliability of the repeated measurement error was assessed using intraclass correlation coefficient. RESULTS: All mean differences among the printing variations were statistically insignificant. The Bland-Altman plots verified a high degree of agreement among all model sets and printing variations. In addition, the measurements were highly reproducible; this was demonstrated by the high intraclass correlation coefficient for all measurements recorded. CONCLUSIONS: The DLP printer produced clinically acceptable models in all areas of the build plate, with hollow and solid model shells, and at its high-speed setting of 100 microns. The applications of the DLP printer tested should be a viable option for printing in a clinical environment at a high-speed setting while filling the build plate and printing with less resin. Published by Elsevier Inc.
Authors: Julia Süpple; Julius von Glasenapp; Eva Hofmann; Paul-Georg Jost-Brinkmann; Petra Julia Koch Journal: J Clin Med Date: 2021-05-07 Impact factor: 4.241